题目内容
7．We must save water in our daily life．water mustbesaved in our daily life．
分析 我们必须在日常生活中节约用水．
解答 答案：be saved．考查句型转换．句意"我们必须在日常生活中节约用水．"根据题干water must____ ____ in our daily life．意思应为水在我们的日常生活中必须被节约．这里应该改为被动语态，结构be+done，这里must是情态动词，所以应该用be．故答案为be saved．
点评 了解原句意思，再结合题干和所学知识对原句进行相应的转换，使句意不变．
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